steve68steve
Active Member
[As noted in my post when this thread became it's own, this thread has been split from Zepfan finding a piece of metal in his engine in the thread called "Cold Start / Chain Tensioner / Busted Motor JUNK TENERE ??" (http://www.yamahasupertenere.com/index.php?topic=23468.0) If something seems a bit disjointed, it's because that thread got to the point where people were trying to respond in single posts to both Zepfan and Steve68Steve. - Checkswrecks]
Now for the hi-jack. I'm a day or two ahead of you, so you'll be looking at this on your bike soon.
Look at this pic of my intake cam sprocket.
There are 3 things that bother me:
1. The gap between the peaks and troughs - it looks like the chain is not fully meshed with the sprocket. I don't know how much gap is normal.
2. The small gap at the pitch diameter - the manual says "1/4 tooth". How the heck are you supposed to measure THAT? I'm well below 1/4, but still...
3. The rainbow of colored metal in the center of the pic. Is this a vestige of heat treating and normal, or were these sprockets cooked in operation?
Now, look at how little adjustment is left in my brandy-new Graves manual CCT:
This pic makes me question whether my CCT was really bad or whether I just needed a new chain and sprockets. Is this normal with 36k mi on the bike? In other words, does the amount of wear and adjustment left translate to another 100k mi or another 20k mi. If the former, I'm buttoning it back up. If the latter, I'm offline again waiting for a new chain and sprockets.
Sorry for hi-jack, Zepfan. Hopefully this info will help you... altho at 80k mi and how much money you spent on parts, maybe you're already out in front of this.
Now for the hi-jack. I'm a day or two ahead of you, so you'll be looking at this on your bike soon.
Look at this pic of my intake cam sprocket.
There are 3 things that bother me:
1. The gap between the peaks and troughs - it looks like the chain is not fully meshed with the sprocket. I don't know how much gap is normal.
2. The small gap at the pitch diameter - the manual says "1/4 tooth". How the heck are you supposed to measure THAT? I'm well below 1/4, but still...
3. The rainbow of colored metal in the center of the pic. Is this a vestige of heat treating and normal, or were these sprockets cooked in operation?
Now, look at how little adjustment is left in my brandy-new Graves manual CCT:
This pic makes me question whether my CCT was really bad or whether I just needed a new chain and sprockets. Is this normal with 36k mi on the bike? In other words, does the amount of wear and adjustment left translate to another 100k mi or another 20k mi. If the former, I'm buttoning it back up. If the latter, I'm offline again waiting for a new chain and sprockets.
Sorry for hi-jack, Zepfan. Hopefully this info will help you... altho at 80k mi and how much money you spent on parts, maybe you're already out in front of this.